CN101706836A - Method for designing vibration isolation optimizing type main vibration isolator of cab - Google Patents
Method for designing vibration isolation optimizing type main vibration isolator of cab Download PDFInfo
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- CN101706836A CN101706836A CN200910172785A CN200910172785A CN101706836A CN 101706836 A CN101706836 A CN 101706836A CN 200910172785 A CN200910172785 A CN 200910172785A CN 200910172785 A CN200910172785 A CN 200910172785A CN 101706836 A CN101706836 A CN 101706836A
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Abstract
The invention discloses a method for designing a vibration isolation optimizing type main vibration isolator of a cab, belonging to a method for designing a cab vibration isolator. The method comprises the following steps of: on the basis of carrying out harmony response kinetic analysis on a cab suspension system, detecting axial rigidity value and radial rigidity value of a vibration isolator, and converting the obtained axial rigidity value and the radial rigidity value of the vibration isolator to an optimum design variable; detecting advancing direction displacement response amplitude at one point of a soleplate of the cab and one point higher than a seat of the cab, and taking the difference of the advancing direction displacement response amplitudes of one point of the soleplate of the cab and one point higher than the seat of the cab as an optimizing target function; detecting a displacement response value at one point of the soleplate of the cab in the vertical direction, taking the vertical direction displacement response value of one point of the soleplate of the cab as a state variable, carrying out rigidity optimization calculation on the vibration isolator by utilizing above three groups of numerical values, and combining with a conventional method to design an effective vibration isolator. The invention has the advantages that based on the emulation analysis to a finite element, the vibration isolation optimization method for calculating the rigidity of the vibration isolator can be applied to vertical and low-frequency swaying vibration isolation.
Description
Technical field
The present invention relates to a kind of method for designing of pilothouse vibration isolator, particularly a kind of method for designing vibration isolation optimizing type main vibration isolator of cab.
Background technology
Along with the raising that people require the vehicle driving comfort, the vibration isolation design of engineering machinery driving cabin is more and more paid attention to by people.Classical vibration isolation design theory can solve single-degree-of-freedom vibration isolation problem preferably, but but seems not enough for multivariant vibration isolation and multilayer vibration isolation problem.Finite element method, has obtained developing widely and using with its exclusive design, calculating advantage as the widely used a kind of design of engineering, computing method since 20 middle of century.
The vibration isolation of China's construction-vehicle cab design is at present adopted mostly and the pilothouse vibrating isolation system is carried out humorous response power credit is analysed the back and adopt the single-degree-of-freedom theory of vibration isolation to calculate vibration isolator rigidity, though this method can solve vertical vibration isolation problem preferably, but be difficult to solve for and the less pilothouse low frequency that the causes problem of rocking of vibration isolator supporting spacing higher because of the pilothouse barycenter.
Summary of the invention
The objective of the invention is to provide a kind of on the basis of finite element simulation, can take into account vertical vibration isolation and can solve the method for designing vibration isolation optimizing type main vibration isolator of cab that the pilothouse low frequency rocks problem again.
The object of the present invention is achieved like this: at first the cab mounting system is carried out humorous response power credit and analyse, the cab mounting system is being carried out on the basis that humorous response power credit analyses, detecting the axial rigidity value and the radial rigidity value of vibration isolator, is the optimal design variable with the axial rigidity value and the radial rigidity value of the vibration isolator that obtains; At the base plate of pilothouse a bit and the more contour working direction displacement response amplitude that detects in pilothouse seat, be the optimization aim function with pilothouse base plate any and the more contour working direction displacement response difference in magnitude in pilothouse seat; Detect the displacement response in any vertical direction of pilothouse base plate, with any vertical direction displacement response value of pilothouse base plate is state variable, utilize above-mentioned three groups of numerical value that vibration isolator is carried out the rigidity computation optimization, in conjunction with conventional design method, design effective main vibration isolator according to result of calculation.
Described effective main vibration isolator comprises pilothouse base plate (6), upper steel plate (7), rubber vibration insulating pad (8), rubber blanket (9), bolt (10), packing ring (11), nut (12), lower steel plate (13), vehicle frame (14), eye bolt (15), packing ring (16), hexagon slotted nut (17) and split pin (18), upper steel plate (7) is connected with pilothouse base plate (6) by bolt, and upper steel plate (7) interposition is equipped with protruding " V " shape structure; Lower steel plate (13) is connected with vehicle frame by bolt, lower steel plate (13) recessed " V " shape structure, and two " V " shapes are corresponding, between two " V " shape structures rubber vibration insulating pad (8) arranged; There is eye bolt (15) to pass pilothouse base plate (6), upper steel plate (7), lower steel plate (13) and vehicle frame, the other end at eye bolt (15) is connected with hexagon slotted nut (17), rubber blanket (9) is arranged between hexagon slotted nut (17) and vehicle frame, on the hole of eye bolt (15), be connected with split pin (18).
Described rigidity computation optimization is to utilize computing machine and computer program to calculate computation process: beginning; Objective definition function U X
B-UX
ADefinition status variable UY; Definition K1 and K2; Assignment: objective function initial value, state variable initial value; Variation range and the change step of definition K1 are composed the K1 value by cycle index, the beginning outer circulation; Definition K2 variation range is change step too, composes the K2 value by cycle index; By K1, the K2 value after the above-mentioned assignment, carry out the humorous RESPONSE CALCULATION of finite model; Whether state variable is less than initial value; Whether target function value is less than initial value; Compose the new initial value of objective function; Interior loop termination is judged; Outer circulation stops judging; Record K1, K2; Target function value, state variable value; Finish.
Beneficial effect: owing to adopted such scheme, adopt this vibration isolation optimizing method, with the pilothouse base plate a bit and the displacement response difference in magnitude of the more contour working direction in pilothouse seat, can estimate the size that the pilothouse low frequency rocks preferably; Can estimate the vertical vibration isolation of pilothouse preferably with the vertical deviation response of any on the pilothouse base plate.Be respectively objective function and function of state, just can be used for the Optimal Stiffness value of Computer Automatic Search vibration isolator.Main vibration isolator according to the Optimal Stiffness design of calculating with the method promptly can guarantee low frequency rolling momentum minimum, can guarantee the vibration isolation of vertical direction again.Reached purpose of the present invention.
Advantage: this method for designing is based on the finite element simulation analysis, the vibration isolation optimizing method of computation optimization vibration isolator rigidity, can take into account vertical vibration isolation, simultaneously can solve the pilothouse low frequency again and rock problem, and design main vibration isolator of cab with vertical vibration isolation and horizontal vibration isolating effect with result of calculation.
Description of drawings
Fig. 1 is the check point A that selects on pilothouse in the vibration isolation optimizing method of the present invention, the synoptic diagram of B.
Fig. 2 is that the present invention is according to effective main vibration isolator structural drawing of optimizing consequence devised.
Fig. 3 is a computer optimization calculation flow chart of the present invention.
Among the figure: 1, pilothouse center of gravity G; 2, pilothouse; 3, main vibration isolator; 4, check point A; 5, check point B; 6, pilothouse base plate; 7, upper steel plate; 8, rubber vibration insulating pad; 9, rubber blanket; 10, bolt; 11, packing ring; 12, nut; 13, lower steel plate; 14, vehicle frame; 15, capstan nut; 16, packing ring; 17, hexagon slotted nut; 18, split pin.
Embodiment
Embodiment 1: at first the cab mounting system is carried out humorous response power credit and analyse, the cab mounting system is being carried out on the basis that humorous response power credit analyses, axial rigidity and radial rigidity with vibration isolator are the optimal design variable, with the pilothouse base plate a bit and the more contour working direction displacement response difference in magnitude in pilothouse seat be the optimization aim function, with any vertical direction displacement response value of pilothouse base plate is state variable, carry out vibration isolator rigidity computation optimization, in conjunction with conventional design method, design effective main vibration isolator according to result of calculation.
Check point A and check point B are set on pilothouse 2, and check point A is on the base plate a bit, and check point B point is the seat contour point, connects main vibration isolator in the bottom of pilothouse, and focus point G is arranged on pilothouse.
The mathematical model of vibration isolation optimizing is:
Described objective function: Min (UX
B-UX
A)
Described state variable: UYmax
Described design variable: K1, K2
Wherein, UX
AAnd UX
BBeing respectively the pilothouse base plate and a bit being check point A and pilothouse seat more contour is the displacement response amplitude of the working direction of check point B, with difference in magnitude (UX
B-UX
A) as objective function.UYmax is the maximal value of the vertical deviation response of any on the pilothouse base plate.K1 and K2 are respectively the axial rigidity and the radial rigidities of vibration isolator.Be optimized with computing machine.According to optimizing the consequence devised main vibration isolator.
Described effective main vibration isolator comprises pilothouse base plate 6, upper steel plate 7, rubber vibration insulating pad 8, rubber blanket 9, bolt 10, packing ring 11, nut 12, lower steel plate 13, vehicle frame 14, eye bolt 15, packing ring 16, hexagon slotted nut 17 and split pin 18, upper steel plate is connected with the pilothouse base plate by bolt, and the upper steel plate interposition is equipped with protruding " V " shape structure; Lower steel plate is connected with vehicle frame by bolt, lower steel plate recessed " V " shape structure, and two " V " shapes are corresponding, between two " V " shape structures rubber vibration insulating pad arranged; There is eye bolt to pass pilothouse base plate, upper steel plate, lower steel plate and vehicle frame, is connected with hexagon slotted nut, between hexagon slotted nut and vehicle frame, rubber blanket is arranged, on the hole of eye bolt, be connected with split pin at the other end of eye bolt.
Described rigidity computation optimization is to utilize computing machine and computer program to calculate computation process: beginning; Objective definition function U X
B-UX
ADefinition status variable UY; Definition K1 and K2; Assignment: objective function initial value, state variable initial value; Variation range and the change step of definition K1 are composed the K1 value by cycle index, the beginning outer circulation; Definition K2 variation range is change step too, composes the K2 value by cycle index; By K1, the K2 value after the above-mentioned assignment, carry out the humorous RESPONSE CALCULATION of finite model; Whether state variable is less than initial value; Whether target function value is less than initial value; Compose the new initial value of objective function; Interior loop termination is judged; Outer circulation stops judging; Record K1, K2; Target function value, state variable value; Finish.
Claims (3)
1. method for designing vibration isolation optimizing type main vibration isolator of cab, comprise that at first the cab mounting system being carried out humorous response power credit analyses, it is characterized in that: the cab mounting system is being carried out on the basis that humorous response power credit analyses, detecting the axial rigidity value and the radial rigidity value of vibration isolator, is the optimal design variable with the axial rigidity value and the radial rigidity value of the vibration isolator that obtains; At the base plate of pilothouse a bit and the more contour working direction displacement response amplitude that detects in pilothouse seat, be the optimization aim function with pilothouse base plate any and the more contour working direction displacement response difference in magnitude in pilothouse seat; Detect the displacement response in any vertical direction of pilothouse base plate, with any vertical direction displacement response value of pilothouse base plate is state variable, utilize above-mentioned three groups of numerical value that vibration isolator is carried out the rigidity computation optimization, in conjunction with conventional design method, design effective main vibration isolator according to result of calculation.
2. method for designing vibration isolation optimizing type main vibration isolator of cab according to claim 1 is characterized in that: described rigidity computation optimization is to utilize computing machine and computer program to calculate computation process: beginning; Objective definition function U X
B-UX
ADefinition status variable UY; Definition K1 and K2; Assignment: objective function initial value, state variable initial value; Variation range and the change step of definition K1 are composed the K1 value by cycle index, the beginning outer circulation; Definition K2 variation range is change step too, composes the K2 value by cycle index; By K1, the K2 value after the above-mentioned assignment, carry out the humorous RESPONSE CALCULATION of finite model; Whether state variable is less than initial value; Whether target function value is less than initial value; Compose the new initial value of objective function; Interior loop termination is judged; Outer circulation stops judging; Record K1, K2; Target function value, state variable value; Finish.
3. effective main vibration isolator of method for designing vibration isolation optimizing type main vibration isolator of cab design, it is characterized in that: described effective main vibration isolator comprises pilothouse base plate (6), upper steel plate (7), rubber vibration insulating pad (8), rubber blanket (9), bolt (10), packing ring (11), nut (12), lower steel plate (13), vehicle frame (14), eye bolt (15), packing ring (16), hexagon slotted nut (17) and split pin (18), upper steel plate (7) is connected with pilothouse base plate (6) by bolt, and upper steel plate (7) interposition is equipped with protruding " V " shape structure; Lower steel plate (13) is connected with vehicle frame by bolt, lower steel plate (13) recessed " V " shape structure, and two " V " shapes are corresponding, between two " V " shape structures rubber vibration insulating pad (8) arranged; There is eye bolt (15) to pass pilothouse base plate (6), upper steel plate (7), lower steel plate (13) and vehicle frame, the other end at eye bolt (15) is connected with hexagon slotted nut (17), rubber blanket (9) is arranged between hexagon slotted nut (17) and vehicle frame, on the hole of eye bolt (15), be connected with split pin (18).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172785A CN101706836A (en) | 2009-11-17 | 2009-11-17 | Method for designing vibration isolation optimizing type main vibration isolator of cab |
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|---|---|---|---|
| CN200910172785A CN101706836A (en) | 2009-11-17 | 2009-11-17 | Method for designing vibration isolation optimizing type main vibration isolator of cab |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970916A (en) * | 2013-01-28 | 2014-08-06 | 同济大学 | Cab design method based on cab sound reduction index analysis |
| RU2754014C1 (en) * | 2020-07-14 | 2021-08-25 | Илья Юрьевич Лебединский | Method for optimisation of suspension system of cabin of transport and technological machines |
-
2009
- 2009-11-17 CN CN200910172785A patent/CN101706836A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103970916A (en) * | 2013-01-28 | 2014-08-06 | 同济大学 | Cab design method based on cab sound reduction index analysis |
| CN103970916B (en) * | 2013-01-28 | 2017-12-15 | 同济大学 | A kind of cabin design method based on the analysis of driver's cabin oise insulation factor |
| RU2754014C1 (en) * | 2020-07-14 | 2021-08-25 | Илья Юрьевич Лебединский | Method for optimisation of suspension system of cabin of transport and technological machines |
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Open date: 20100512 |